Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles
We report the synthesis, structural characterization, and atomistic simulations of AgPd–Pt trimetallic (TM) nanoparticles. Two types of structure were synthesized using a relatively facile chemical method: multiply twinned core–shell, and hollow particles. The nanoparticles were small in size, with...
| Autores principales: | , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | inglés |
| Publicado: |
Royal Society of Chemistry Publishing
2013
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| Materias: | |
| Acceso en línea: | http://eprints.uanl.mx/8913/1/Trimetallic%20nanostructures%20the%20case%20of%20AgPd%E2%80%93Pt%20multiply%20twinned%20nanoparticles.pdf |
| _version_ | 1824370865616191488 |
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| author | Khanal, Subarna Bhattarai, Nabraj Velázquez Salazar, J. Jesús Bahena, Daniel Soldano, German Ponce, Arturo Mariscal, Marcelo M. Mejía Rosales, Sergio Yacamán, Miguel José |
| author_facet | Khanal, Subarna Bhattarai, Nabraj Velázquez Salazar, J. Jesús Bahena, Daniel Soldano, German Ponce, Arturo Mariscal, Marcelo M. Mejía Rosales, Sergio Yacamán, Miguel José |
| author_sort | Khanal, Subarna |
| collection | Repositorio Institucional |
| description | We report the synthesis, structural characterization, and atomistic simulations of AgPd–Pt trimetallic (TM) nanoparticles. Two types of structure were synthesized using a relatively facile chemical method: multiply twinned core–shell, and hollow particles. The nanoparticles were small in size, with an average diameter of 11 nm and a narrow distribution, and their characterization by aberration corrected scanning transmission electron microscopy allowed us to probe the structure of the particles at an atomistic level. In some nanoparticles, the formation of a hollow structure was also observed, that facilitates the alloying of Ag and Pt in the shell region and the segregation of Ag atoms on the surface, affecting the catalytic activity and stability. We also investigated the growth mechanism of the nanoparticles using grand canonical Monte Carlo simulations, and we have found that Pt regions grow at overpotentials on the AgPd nanoalloys, forming 3D islands at the early stages of the deposition process. We found very good agreement between the simulated structures and those observed experimentally. |
| format | Article |
| id | eprints-8913 |
| institution | UANL |
| language | English |
| publishDate | 2013 |
| publisher | Royal Society of Chemistry Publishing |
| record_format | eprints |
| spelling | eprints-89132016-02-03T21:56:32Z http://eprints.uanl.mx/8913/ Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles Khanal, Subarna Bhattarai, Nabraj Velázquez Salazar, J. Jesús Bahena, Daniel Soldano, German Ponce, Arturo Mariscal, Marcelo M. Mejía Rosales, Sergio Yacamán, Miguel José Q Ciencias en General QC Física We report the synthesis, structural characterization, and atomistic simulations of AgPd–Pt trimetallic (TM) nanoparticles. Two types of structure were synthesized using a relatively facile chemical method: multiply twinned core–shell, and hollow particles. The nanoparticles were small in size, with an average diameter of 11 nm and a narrow distribution, and their characterization by aberration corrected scanning transmission electron microscopy allowed us to probe the structure of the particles at an atomistic level. In some nanoparticles, the formation of a hollow structure was also observed, that facilitates the alloying of Ag and Pt in the shell region and the segregation of Ag atoms on the surface, affecting the catalytic activity and stability. We also investigated the growth mechanism of the nanoparticles using grand canonical Monte Carlo simulations, and we have found that Pt regions grow at overpotentials on the AgPd nanoalloys, forming 3D islands at the early stages of the deposition process. We found very good agreement between the simulated structures and those observed experimentally. Royal Society of Chemistry Publishing 2013 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/8913/1/Trimetallic%20nanostructures%20the%20case%20of%20AgPd%E2%80%93Pt%20multiply%20twinned%20nanoparticles.pdf http://eprints.uanl.mx/8913/1.haspreviewThumbnailVersion/Trimetallic%20nanostructures%20the%20case%20of%20AgPd%E2%80%93Pt%20multiply%20twinned%20nanoparticles.pdf Khanal, Subarna y Bhattarai, Nabraj y Velázquez Salazar, J. Jesús y Bahena, Daniel y Soldano, German y Ponce, Arturo y Mariscal, Marcelo M. y Mejía Rosales, Sergio y Yacamán, Miguel José (2013) Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles. Nanoscale, 24 (5). pp. 12456-12463. ISSN 2040-3364 |
| spellingShingle | Q Ciencias en General QC Física Khanal, Subarna Bhattarai, Nabraj Velázquez Salazar, J. Jesús Bahena, Daniel Soldano, German Ponce, Arturo Mariscal, Marcelo M. Mejía Rosales, Sergio Yacamán, Miguel José Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles |
| title_full | Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles |
| title_fullStr | Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles |
| title_full_unstemmed | Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles |
| title_short | Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles |
| title_sort | trimetallic nanostructures the case of agpd pt multiply twinned nanoparticles |
| topic | Q Ciencias en General QC Física |
| url | http://eprints.uanl.mx/8913/1/Trimetallic%20nanostructures%20the%20case%20of%20AgPd%E2%80%93Pt%20multiply%20twinned%20nanoparticles.pdf |
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